Warlords can get level one boss kills with a bit of luck. The idea is to string as many "free hit" mechanics together as you can. If you get enough to kill the boss, you win. Possibilities (not exhaustive):
CYDSTEP (you start with this, and can recast it)
Schadenfreude (prep one, buy another)
Clearance (worth many hits if you bricks lots of monsters while exploring under Earthmother)
Refreshment (Mystera, combos well with Mystic Balance)
Quicksilver (prep, Tikki Tooki, shop)
Reflexes (prep, Tikki Tooki, shop)
Badge of Courage (shop, most likely)
First Strike or Slow (GETINDERE, WEYTWUT, Earthmother)
Dodge (Getindere or Tikki Tooki)
Extreme health stacking (unlikely, but possible in edge cases)
Namtar's Token (only good for one hit, because we are trying to do this at level 1, but it's there)
Then you get as many damage enhancers as you can to lower the number of hits needed. Orc is the obvious choice for race. You need lots of stuff to go right for it to work, but there are lots of things out there, and you can usually find a winning solution more often than not. Start practicing it in Venture Cave and then try more daring things later.
Part of the challenge is not accidentally hitting level 2.
